BE792988A - DIGITAL DEVICE - Google Patents

DIGITAL DEVICE

Info

Publication number: BE792988A
Authority: BE; Belgium
Prior art keywords: digital device; digital
Prior art date: 1971-12-22

Application number

Other languages

French (fr)

Inventor

M R Aaron

H Kaneko

Original Assignee

Western Electric Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1971-12-22

Publication date

1973-04-16

1973-04-16 Publication of BE792988A publication Critical patent/BE792988A/en

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/046—Systems or methods for reducing noise or bandwidth
- H04B14/048—Non linear compression or expansion
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/002—Control of digital or coded signals
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/0054—Attenuators
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/50—Conversion to or from non-linear codes, e.g. companding
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Nonlinear Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Theoretical Computer Science (AREA)
Complex Calculations (AREA)
Compression, Expansion, Code Conversion, And Decoders (AREA)
Analogue/Digital Conversion (AREA)

BE792988D 1971-12-22 DIGITAL DEVICE BE792988A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US21079571A	1971-12-22	1971-12-22

Publications (1)

Publication Number	Publication Date
BE792988A true BE792988A (en)	1973-04-16

Family

ID=22784291

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE792988D BE792988A (en)	1971-12-22		DIGITAL DEVICE

Country Status (10)

Country	Link
US (1)	US3752970A (en)
JP (1)	JPS4874162A (en)
BE (1)	BE792988A (en)
CA (1)	CA948716A (en)
DE (1)	DE2262048A1 (en)
FR (1)	FR2164820B1 (en)
GB (1)	GB1410816A (en)
IT (1)	IT976146B (en)
NL (1)	NL7217206A (en)
SE (1)	SE377395B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1360943A (en) *	1972-02-24	1974-07-24	Marconi Co Ltd	Digital-to-analogue converters
US4118785A (en) *	1973-10-08	1978-10-03	Nippon Telegraph And Telephone Public Corporation	Method and apparatus for digital attenuation by pattern shifting
US4181970A (en) *	1973-10-08	1980-01-01	Nippon Telegraph And Telephone Public Corporation	Digital attenuator for compressed PCM signals
JPS5534613B2 (en) *	1973-10-08	1980-09-08
FR2250234B1 (en) *	1973-10-31	1976-10-01	Alsthom Cgee
CA1021879A (en) *	1975-12-11	1977-11-29	Ernst A. Munter	Incrementally adjustable digital attenuator/amplifier
NL7800406A (en) *	1978-01-13	1979-07-17	Philips Nv	DEVICE FOR FILTERING COMPRESSED PULSE CODE MODULATED SIGNALS.
NL7801866A (en) *	1978-02-20	1979-08-22	Philips Nv	DIGITAL FILTER DEVICE FOR NON-UNIFORM QUANTIZED PCM.
US4454498A (en) *	1979-05-21	1984-06-12	Siemens Aktiengesellschaft	Adjustable attenuation member for a digital telecommunications system
JPH073949B2 (en) *	1986-01-31	1995-01-18	ソニー株式会社	Gain control circuit
JP2980615B2 (en) *	1989-06-19	1999-11-22	アルプス電気株式会社	Code encoding method for location information
US5237591A (en) *	1991-08-19	1993-08-17	At&T Bell Laboratories	Circuit for digitally adding loss to a signal
US5495529A (en) *	1992-11-26	1996-02-27	Nec Corporation	Digital sound level control apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2768352A (en) *	1950-10-20	1956-10-23	Ericsson Telefon Ab L M	Compressor-expander transmission system
NL280023A (en) *	1961-06-23
US3594560A (en) *	1969-01-03	1971-07-20	Bell Telephone Labor Inc	Digital expandor circuit
US3688097A (en) *	1970-05-20	1972-08-29	Bell Telephone Labor Inc	Digital attenuator for non-linear pulse code modulation signals

0
- BE BE792988D patent/BE792988A/en unknown
1971
- 1971-12-22 US US00210795A patent/US3752970A/en not_active Expired - Lifetime
1972
- 1972-06-28 CA CA145,912A patent/CA948716A/en not_active Expired
- 1972-12-13 SE SE7216286A patent/SE377395B/xx unknown
- 1972-12-18 NL NL7217206A patent/NL7217206A/xx not_active Application Discontinuation
- 1972-12-19 DE DE19722262048 patent/DE2262048A1/en active Pending
- 1972-12-21 JP JP47127772A patent/JPS4874162A/ja active Pending
- 1972-12-21 FR FR7245714A patent/FR2164820B1/fr not_active Expired
- 1972-12-21 GB GB5901972A patent/GB1410816A/en not_active Expired
- 1972-12-21 IT IT71038/72A patent/IT976146B/en active

Also Published As

Publication number	Publication date
US3752970A (en)	1973-08-14
IT976146B (en)	1974-08-20
NL7217206A (en)	1973-06-26
FR2164820B1 (en)	1977-04-08
SE377395B (en)	1975-06-30
FR2164820A1 (en)	1973-08-03
GB1410816A (en)	1975-10-22
DE2262048A1 (en)	1973-07-05
JPS4874162A (en)	1973-10-05
CA948716A (en)	1974-06-04

Publication	Publication Date	Title
BE786787A (en)	1972-11-16	DECOMPRESSION DEVICE
CH363072A4 (en)	1976-04-15	Timepiece device
BE785058A (en)	1972-12-18	SUPPORT DEVICE
BE777439A (en)	1972-01-14	HYPODERMAL DEVICE
SE387800B (en)	1976-09-13	DIGITAL ECO-ELIMINATOR
BE794105A (en)	1973-05-16	UNLOADING DEVICE
TR17829A (en)	1976-04-13	SUEPUERME DEVICE
BE783295A (en)	1972-11-10	RADIOGRAPHY DEVICE
SE384922B (en)	1976-05-24	VETEJONKENSLIG METAN DEVICE
BE782635A (en)	1972-08-16	SEMICONDUCTOR DEVICE
BE791487A (en)	1973-03-16	SEMICONDUCTOR DEVICE
BE792988A (en)	1973-04-16	DIGITAL DEVICE
BE790110A (en)	1973-02-01	LIFTING DEVICE
BE785747A (en)	1973-01-02	SEMICONDUCTOR DEVICE
SE388803B (en)	1976-10-18	FOLLOWING DEVICE
SE400352B (en)	1978-03-20	PARTY DEVICE
IT956760B (en)	1973-10-10	RECEIVER DEVICE
BE791888A (en)	1973-05-24	CRYOPUMPING DEVICE
TR17651A (en)	1975-07-23	HARARET MUEBADELE DEVICE
BE783331A (en)	1972-09-01	BREAKER DEVICE
BE780014A (en)	1972-08-29	SEMICONDUCTOR DEVICE
SE383389B (en)	1976-03-08	FLEKING DEVICE
RO69195A (en)	1981-05-30	EXTRACTOR DEVICE
BE785205A (en)	1972-10-16	PUSHING DEVICE
BE774592A (en)	1972-04-28	MEDICAL DEVICE